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2. Why do convection currents occur within the earth? - Socratic

   socratic.org/questions/why-do-convection-currents-occur-within-the-earth

   Magma in the lower mantle is heated by the core and rises toward the crust. It then cools and sinks back down toward the core. Convection currents occur when a reservoir of fluid is heated at the bottom, and allowed to cool at the top.. Heat causes the fluid to expand, decreasing its density. If there is cooler material on top, it will be more compact and therefore, will sink to the bottom ...

3. What are convection currents and what causes them? | Socratic

   socratic.org/questions/what-are-convection-currents-and-what-causes-them

   convection currents occur when a heated fluid expands, becoming less dense, and rises. The fluid then cools and contracts, becoming more dense, and sinks. Convection currents are an important form of heat transfer. Convection occurs when heat cannot efficiently be transferred through radiation or thermal conduction. In astronomy convection currents occur in the mantle of the Earth, and ...

4. Where do convection currents form? - Socratic

   socratic.org/questions/where-do-convection-currents-form

   Convection currents occur when a fluid is near a heat source. Heat sources provide energy to their surroundings. When fluid receives this energy, molecules inside it move around more, spacing out from each other and lowering the density. We know from helium balloons that things with lower densities than their surroundings are pushed upwards. Therefore, the fluid close to the heat source moves ...

5. In what natural cycles do convection currents occur?

   socratic.org/questions/in-what-natural-cycles-do-convection-currents-occur

   The two largest natural cycles where convection currents occur are the movement of air in the atmosphere and the movement of magma in the earth's mantle. In the case of the air, the convection current is induced in a substance in the gaseous state, while in the mantle, the molten rock flow is a substance in a plastic state (between liquid and solid). The convection currents in the atmosphere ...

6. How do convection currents affect tectonic plates? - Socratic

   socratic.org/questions/how-do-convection-currents-affect-tectonic-plates

   Rising magma pushes against and along tectonic plates, which eventually moves the plates together, apart, or along each other. Convection currents happen in fluids with a heat source. Hot liquid or gas near the heat source becomes hotter and less dense, so moves upwards. This forces the cooler stuff at the top to move back down. As the hot molecules move up, they cool down and begin to drop ...

7. How do convection currents cause wind? - Socratic

   socratic.org/questions/how-do-convection-currents-cause-wind

   The best example is a sea breeze. Convection occurs when the Earth is heated unevenly. The air over the Earth will heat according to how fast the Earth under it heats. That part of the atmosphere that heats faster will expand. This relationship between heat and volume is Charles Law. Since the volume increases the pressure will drop. This is due to the fact that air masses do not readily mix ...

8. How are convection currents important in the earth system?

   socratic.org/questions/how-are-convection-currents-important-in-the-earth-system

   one way is that convection currents are thought to be the driving force of plate tectonics that shape and reshape the earth's crusts forming oceans, mountains and continents. Convections currents in the earth's mantle are thought to be the driving force of plate tectonics. Where the hot magma is brought near the surface by the convection currents a divergent boundary is created. The divergent ...

9. How do convection currents move the tectonic plates?

   socratic.org/questions/how-do-convection-currents-move-the-tectonic-plates

   The magma carries the attached crust with it as the magma moves because of convection currents. The idea is that the heat from the earth's interior causes convection currents in the magma. The heat causes the some of the magma to rise toward the surface. When the magma reaches the surface it spreads out and moves away from the hot spot. Then as the magma cools it is pulled down and drops down ...

10. Why do convection currents in the earth's mantle turn left ... -...

    socratic.org/questions/why-do-convection-currents-in-the-earth-s-mantle-turn...

    Actually the convection currents are thought to move both left and right as they reach the surface. Convection currents observed in water rise to the surface and then spread out in both direction. Convection currents in the mantle are thought to operate in the same matter as convection currents in water. The convection currents in the mantle rise at the Mid Atlantic ridge. the lava flows out ...

11. What are convection currents and how do they relate to the ... -...

    socratic.org/questions/what-are-convection-currents-and-how-do-they-relate-to...

    Convection currents are the simple rising of hot matter and the sinking of cooler matter. Explanation: These convection currents push against the tectonic plates causing them to move.